Another
idiom

: : : : Are there any popular
idioms in English meaning that one cannot always possess and take care of two
precious things (say, family and enterprise,romance and reality) together?
:
: : : Thanks a lot!

: : : These may not be exactly what you require, but they're
close.

: : : You can't have your cake and eat it.

: : : or

: : : A dog cannot
have two masters.

: : I thought that was "A man cannot serve two masters"?

:
An idiom used when too many projects or concerns are taking up someone's time
and attention is "spreading oneself thin."